Hadith 1:735

Narrated Abu Rafi':

Once I prayed the 'Isha' prayer with Abu Huraira and he recited,
"Idha-s-Sama' u-nShaqqat" (84) and prostrated. I said, "What is that?"
He said, "I prostrated behind Abu-l-Qasim, (the Prophet) (when he
recited that Sura) and I will go on doing it till I meet him."